In Python 2.6, I used matplotlib to make some simple graphs. However, it is incompatible with Python 3.1.
What are some alternative modules that can accomplish the same
rpy2 is providing access to the graphics capabilities of R, and rpy2 is becoming compatible with Python 3 (thanks to the help of Google for funding Greg over the summer).
Code against the current dev branch is in a patch queue.
edit: rpy2 2.2.0 is working with Python 3.2